喷砂工艺对水性涂装涂层附着力的影响

水性涂装技术由于涂层与基体的附着力不良成为制约其广泛应用的关键。为了提高水性涂装涂层与基体的附着力,本文通过改变前处理喷砂的方式系统研究了涂层的系列组织与性能。结果表明,喷砂处理后试样粗糙度数值越大,涂层附着力越高,耐腐蚀性能越好。当其粗糙度约为27.9μm时,涂层附着力最大可达10.6 MPa;当试样喷砂处理后粗糙度介于23.3～24.5μm之间,涂层附着力最大可达9.3 MPa;而粗糙度数值约为18μm的涂层附着力最大约为7.6 MPa。

Effect of Sandblasting Process on Adhesion of Waterborne Coating

The adhesion between coating and substrate prepared by waterborne coating technology is not very good,and it has become the key to restrict its wide application. In this paper,the microstructure and properties of coatings were systematically studied by changing the way of pre-treatment sand blasting. The results showed that the greater the roughness of the sample after sandblasting,the higher the adhesion of the coating and the better the corrosion resistance. When the roughness is about 27.9 μm,the maximum adhesion of the coating could reach 10.6 MPa;When the roughness is about 23.3~24.5 μm,the maximum adhesion of the coating could reach 9.3 MPa;When the roughness is about 18 μm,the maximum adhesion of the coating is about 7.6 MPa.